# 登录账号
account_set = {'candy','heely','andy'}
user_name = input('请输入账号名：')
password = input('请输入登录密码：')

if user_name in account_set:
    if password == '12314':
        print('登录成功！')
    else:
        print('密码错误！！！')
        # password = input('请重新输入密码：')
else:
    print('账户名不存在！')    